9931445 has 4 divisors (see below), whose sum is σ = 11917740. Its totient is φ = 7945152.

The previous prime is 9931399. The next prime is 9931447. The reversal of 9931445 is 5441399.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1062961 + 8868484 = 1031^2 + 2978^2 .

It is a cyclic number.

It is not a de Polignac number, because 9931445 - 2⁶ = 9931381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9931447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 993140 + ... + 993149.

It is an arithmetic number, because the mean of its divisors is an integer number (2979435).

Almost surely, 2^9931445 is an apocalyptic number.

It is an amenable number.

9931445 is a deficient number, since it is larger than the sum of its proper divisors (1986295).

9931445 is a wasteful number, since it uses less digits than its factorization.

9931445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1986294.

The product of its digits is 19440, while the sum is 35.

The square root of 9931445 is about 3151.4195214221. The cubic root of 9931445 is about 214.9500154218.

The spelling of 9931445 in words is "nine million, nine hundred thirty-one thousand, four hundred forty-five".